Re: ONYX2 Serial Port Question

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Angus Dorbie (dorbie++at++sgi.com)
Wed, 29 Sep 1999 14:54:17 -0700

It seems that this doesn't add much to the solution. You'd just be doing
networking on that million dollar system instead of serial, adding
complexity and latency to the i/0. The point is the serial i/o is built
in so why not just use it of you can make it play with the other
real-time stuff going on.

Sorry if this is a repeat, apparently the original got spam filtered for
arcane reasons.

Cheers,Angus.

ross::barna wrote:
>
> we have an free (with source) system that allows you to use the serial
> ports on a linux box (cheap PC) with Performer (or other libs) on an IRIX
> box.... it also allows for multiple application access to the serial port.
>
> saving you the grief of using a million dollar box for serial comm!
>
> if you are interested, email me.
>
> -ross
>
> _____________________________
> ross::barna
> joga.ummu.umich.edu
>
> On Wed, 29 Sep 1999, Paul S. Cutt wrote:
>
> >
> > Dear Murray,
> >
> > We provide a serial port toolkit XvsLink for driving serial devices under
> > Performer which takes over the work of interfacing with serial devices.
> >
> > I know this does not directly answer your question but just wanted
> > you to know there is software out there to handle serial devices for you.
> > Saving you debugging time.
> >
> > Thanks,
> >
> > paul
> > www.xtensory.com
> > Xtensory Inc
> >
> > On Wed, 29 Sep 1999, Gamble, Murray - Kan AV HFE wrote:
> >
> > >
> > > Hi All,
> > >
> > > I hate to send serial port questions to this group, but the scope of
> > > knowledge represented by the subscribers is just too darn attractive to
> > > ignore.
> > >
> > > Anyways, here's my problem. We have a nice new shiny ONYX2 box in our
> > > lab :-) and are trying to drive several serial devices from the four
> > > serial ports. We are using well known serial devices that have a hsitory
> > > of behaving well but are experiencing an inconsistency between the four
> > > ports. The devices work properly when attached to /dev/ttyd1 and
> > > /dev/ttyd2 but display garbage when connected to /dev/ttyd3 or
> > > /dev/ttyd4. I have checked the "/etc/inittab" file and all four ports
> > > are configured identically (well, actually port 1 is configured as a
> > > console, but with respawn turned "off" - and it works, so I won't
> > > complain). In addition, we have tried connecting the same devices to an
> > > Octane (which, upon examination of the "/etc/inittab" file has the same
> > > settings as the ONYX2) and they don't work there either! I get the same
> > > gobbledy-gook on ports 1 & 2 on the Octane as I do on ports 3 &4 on the
> > > ONYX2.
> > >
> > > Ultimately, we would like to drive these devices from an Octane, but have
> > > been using the ONYX2, since ports 1 & 2 seem to give us the only workable
> > > option thus far.
> > >
> > > Any and all help is greatly appreciated,
> > >
> > > Thanks,
> > >
> > > Murray.
> > >
> > > =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
> > > Murray G. Gamble, B.Eng
> > > Human Factors Engineering - Aerospace
> > > Marconi Canada
> > > Kanata, Ontario, CANADA
> > > -----------------------------------------------------------------------
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> >
>
> -----------------------------------------------------------------------
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-- 
"One of the best-known folk theorems of software engineering is that
60% to 75% of conventional software projects are either never
completed or rejected by their intended users. If that range is
anywhere near true (and I've never met a manager of any experience
who disputes it) then more projects than not are being aimed at goals
which are either (a) not realistically attainable, or (b) just plain
wrong."
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